# Copyright 2018-2021 Xanadu Quantum Technologies Inc.

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
This subpackage contains the quantum tape, which tracks, queues, and
validates quantum operations and measurements.
"""

from .operation_recorder import OperationRecorder
from .qscript import QuantumScript, QuantumScriptBatch, QuantumScriptOrBatch, make_qscript
from .tape import QuantumTape, QuantumTapeBatch
from .expand_tape import expand_tape, expand_tape_state_prep


# pylint: disable=import-outside-toplevel
def __getattr__(key):
    if key == "plxpr_to_tape":
        from .plxpr_conversion import plxpr_to_tape

        return plxpr_to_tape
    raise AttributeError(f"module 'pennylane.tape' has no attribute '{key}'")  # pragma: no cover
